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Mitsui Chemicals: Antibacterial Copper Alloy Film “Copper Stopper(TM)” Bolsters Performance of World-Standard Luggage Line, ProtecA by Ace Co., Ltd.

By Business Wire News   


Mitsui Chemicals, Inc. (TOKYO:4183)(President & CEO: Tsutomu Tannowa ) and its 100% subsidiary, Mitsui Chemicals Industrial Products Ltd. (President: Shu Saito) announced that Mitsui Chemicals’ high performance antibacterial/anti-odor copper coating film, Copper StopperTM, which is distributed and serviced by Mitsui Chemicals Industrial Products, was selected by Ace Co., Ltd. (Shibuya, Tokyo; President: Hiroaki Morishita ) for use in the interior fabric (copper jacquard) of their world-standard luggage line, ProtecA.

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Ace ProtecA

Ace ProtecA “Genio Century” (Photo: Business Wire)

“Copper StopperTM”, developed with Mitsui Chemicals proprietary technology, is a new material coated by vapor deposition nano-coating technology in the thickness of 10 to 100 nanometers. Use of alloy technology resolves the problem of corrosion to which copper is prone.

Copper, an essential nutrient to humans, is known to be highly effective as an antibacterial agent in inhibiting the spread of infections such as A -type influenza virus and MRSA (methicillin -resistant Staphylococcus aureus). It is also known to inhibit growth of fungi such as Trichophyton. Copper’s anti-allergen performance against cedar pollen and mite allergens has also been noted in recent years.

In March 2008, the United States Environmental Protection Agency (EPA) approved registration of antimicrobial copper and copper alloys, the first and only solid materials to receive this type of EPA registration.* As a result, antimicrobial copper alloys have received global attention and are being adopted in hospitals, health and welfare establishments, nurseries, and other facilities requiring hygienic environmental conditions.

Ace Co., Ltd. collaborated with world-class designer, Oki Sato of Nendo to refurbish their key luggage brand, ProtecA, by reinforcing its high quality and high functionality with next-generation, high design.

In line with their concept for ProtecA GENIO CENTURY, Mitsui Chemicals Industrial Products introduced traditional Japanese techniques used in making gold and silver threads for the copper alloy threads used in the luggage line’s innovative and next-generation interior fabric “copper jacquard”.

“Copper StopperTM” has wide applications and new uses are being actively pursued. Currently, the material is being used at Kitasato University Hospital to prevent infections at the blood testing facility of their internal medicine wing. Evaluations to measure efficacy in prevention of infectious diseases are underway at a number of medical facilities and expected to receive high marks.

Other uses such as filters, masks, touch panel films, socks, shoes, and supporters are also being developed and tested. The Mitsui Chemicals Group will continue to pursue expansion of applications for “Copper StopperTM” as a solution provider to one of the world’s major social issues, preventing healthcare-associated infection risks to improve quality of life.


About Mitsui Chemicals (Tokyo: 4183, ISIN: JP3888300005)
Mitsui Chemicals’ roots can be traced back to 1912 when it began producing raw material for chemical fertilizers from coal gas byproducts, the first company in Japan to do so. This undertaking significantly contributed to increasing agricultural productivity, a major social issue at the time. Later, the company evolved its technology from coal chemicals to gas chemicals, and in 1958 it built Japan’s first petrochemical complex and so provided impetus to Japan’s industrial sector. Today, the company boasts many world-class products with sales standing at 1,550 billion yen and with over 135 companies in 27 countries. Its business portfolio includes environment-friendly materials for next-generation mobility, healthcare services to realize health and happiness in an ageing society, packaging that ensures the reliability and safety of food products, agrochemicals that contribute to increased production of food, electronic materials, and environment-friendly materials for the energy sector.
Mitsui Chemicals will continue to contribute to solving social challenges with its state-of-the-art technology and by “Creating New Customer Value through Innovation”.
More information can be found at

Media Contact
Mitsui Chemicals
Yuri Matsunaga, +81-3-6253-2100
Corporate Communications Division


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